Results 11 to 20 of about 91,605 (239)

Study on Fatigue Life Prediction of Crossed Roller Bearings [PDF]

한국정밀공학회지
This paper presents a method for estimating the fatigue life of crossed roller bearings (XRBs). XRBs feature a single row of rollers arranged alternately at right angles, making them ideal for applications that require high precision and a compact design.
Gilbert Rivera, Dong-Hyeok Kim, Dong Uk Kim, Seong-Wook Hong   +3 more
doaj   +1 more source

Rate of Growth of Population and Aggregate Saving in the Basic Life-Cycle Model

Economia politica, 2010
In this paper we explore the impact of the life-cycle dynamics of family composition on the aggregate propensity to save and on the relationship between the latter and the rate of growth of population, in the hypothesis of life-cycle behaviour. We depart from Modigliani-Brumberg's basic model by assuming that the household, rather than the individual ...
CASAROSA, CARLO, SPATARO, LUCA
openaire   +2 more sources

Reductions in wind farm main bearing rating lives resulting from wake impingement [PDF]

Wind Energy Science
This paper studies the impacts of wake impingement on main bearing rating lives predicted during the wind turbine design stage. A computational tool chain was developed to explore and quantify these effects across a wind farm populated by 10 MW wind ...
J. Quick, E. Hart, M. B. Nilsen, R. S. Lund, J. Liew, P. Huang, P.-E. Rethore, J. Keller, W. Song, Y. Guo   +9 more
doaj   +1 more source

Recalculation of the basic static load of ball screws

Advances in Mechanical Engineering, 2019
Based on the correction factor of accuracy applied in ISO standard 3408-4:2006, this article proposed a modified method to calculate the effective ball number and basic static load rating of ball screws.
Huaxi Zhou, Changguang Zhou, Yi Ou, Zeng-Tao Chen   +3 more
doaj   +1 more source

Animation and interactivity facilitate acquisition of pediatric life support skills: a randomized controlled trial using virtual patients versus video instruction

BMC Medical Education, 2019
Background Several promising studies suggest a positive impact of interactive and media-enriched e-learning resources such as virtual patients (VP) on skill acquisition in pediatric basic life support (PBLS).
Ronny Lehmann, Thomas Lutz, Astrid Helling-Bakki, Sebastian Kummer, Sören Huwendiek, Hans Martin Bosse   +5 more
doaj   +1 more source

The Development of a Basic Life Habit Parents Rating Scale for Infant Early Childhood

Korean Journal of Child Studies, 2011
The purpose of this study was to develop a basic life habit scale for infant early childhood. The participants of this study were composed of 1,000 parents of children aged from two to five years old in the Seoul, Gyeong-gi, and In-cheon areas. For the purposes of data analysis, the study made use of the following methods : descriptive statistics for ...
Myoung-Soon Kim, Hye-Weon Byun, Gil-Sook Kim   +2 more
openaire   +1 more source

Design algorithm for generatrix profile of cylindrical crowned rollers

MATEC Web of Conferences, 2017
The cross-section of roller profile controls the pressure distribution in the contact area and radically affects the roller bearings basic dynamic load rating and rating lives.
Creţu Spiridon
doaj   +1 more source

Aesthetic Perception of Visual Textures: A Holistic Exploration using Texture Analysis, Psychological Experiment and Perception Modeling

Frontiers in Computational Neuroscience, 2015
Modeling human aesthetic perception of visual textures is important and valuable in numerous industrial domains, such as product design, architectural design and decoration.
Jianli eLiu, Edwin eLughofer, Xianyi eZeng   +2 more
doaj   +1 more source

EFFECT OF PRELOAD OF ANGULAR CONTACT BALL BEARINGS ON LIFE OF BEARINGS [PDF]

Scientific Journal of Silesian University of Technology. Series Transport, 2014
Angular contact ball bearings are commonly used in such situations when you need to reach high bearing stiffness. However, a significant stiffness increase can be achieved only through the introduction of preload to the angular contact bearings.
Andrzej RACZYŃSKI, Jarosław KACZOR
doaj  

Worsening pain and quality of life for spine surgery patients during the COVID-19 pandemic: Roles of psychological distress and patient activation

North American Spine Society Journal, 2022
Background: Public health measures during the COVID-19 pandemic have disrupted access to basic resources (income, food, housing, healthcare). The effects may impact patients differently based on socioeconomic status (SES), pre-existing psychological ...
Rachel S. Bronheim, Khaled M. Kebaish, Amit Jain, Brian J. Neuman, Richard L. Skolasky   +4 more
doaj   +1 more source